Calculate your exact potato needs to achieve total self-sufficiency in your own garden

Gardening · Published 29 September 2026 · Updated 20 October 2026 Swipe more like this →

In short: Achieving potato self-sufficiency is not about luck; it is a precise mathematical exercise. By calculating your weekly consumption, storage capacity, and expected yield per square meter, you can determine exactly how many plants you need to sustain your household year-round. Stop guessing and start planning your harvest with this formula.

To become self-sufficient in potatoes, you must first define your personal consumption. While a standard portion is 200g, individual appetites vary. If you consume five portions weekly, your requirement is 2kg per week. However, practical storage limitations often dictate your growing season. If you lack freezer space or prefer simple storage, you might aim to cover 44 weeks of the year, totaling 88kg of potatoes.

Once your total weight requirement is set, you must calculate the necessary growing space. In fertile soil, maincrop potatoes can yield 1.8kg per plant. Planting five plants per square meter results in a yield of 9kg per square meter. To account for more extensive growing conditions with less fertility, it is safer to estimate a yield of 7kg per square meter. Dividing your total annual requirement by this yield provides the necessary area; for 88kg, you would need 12.6 square meters.

Finally, you must build in redundancy to protect against low yields or crop failures. Multiplying your required area by a factor of 1.2 ensures a buffer. For a 12.6 square meter plot, this brings the total to approximately 15.1 square meters. At five plants per square meter, you would need 76 plants in total. For a 10-month supply, this equates to a 5x3 meter growing area. As you gain experience, you can refine these calculations to better suit your specific household needs and soil conditions.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

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